If I vMotion all VM's to one host (call it host#1), then power down the other host (host#2), I have no latency spikes.
As soon as I power on the host #2 (boots to internal storage, in maintenance mode), the latency on the VM's (on host #1) will still spike for periods.

Reversing, I can vMotion all VM's to host #2, and power down host #1 - the VM's run fine on host #2. Powering on host #1, I start getting latency spikes.
Looking for assistance...thoughts...help?